Window-lock.



No. 683,650. Patented Oct. I, [9011,

J. A. KNISELY. WINDOW LOCK (Application filed June 21, 1901.)

(No Model.)

- gal/Wm wmvsssas m VENTO/f A7 OHNEY UNITED STATES PATENT OFFICE.

JOHN A. KNISELY, OF CHICAGO, ILLINOIS.

WINDOW-LOCK.

SPECIFICATION forming part of Letters Patent No. 683,650, dated October 1, 1901.

Application filed June 21,1901.

To all whom it may concern:

Be it known that I, J OHN A. KNISELY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in WindoW Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in window-locks of the class adapted for looking or latching pivoted metal sash to sheet-m etal window-frames.

The object of myimprovements is to provide a lock that will hold the sash securely to the frame, so that it will not rattle, that will serve the double purpose of a springlatch or look and a lever opener or starter, and that will be certain or positive in its action under the varying conditions met in sheet-metal construction. Having these purposes and others of simplicity in use and economy of construction in view, I have designed the lock hereinafter described, and illustrated in the accompanying drawings, in which- Figure 1 is a view, partly in elevation and partly in vertical section, representing my improved lock applied to a metal window-sash pivoted and locked on a metal frame, only the top portion or lintel of the latter being shown. Fig. 2 is a-view of the same character as Fig. 1; but the sash is shown as unlatched and slightly tilted. Fig. 3 is a detail in side elevation of the lock alone. Fig. 4 is a front elevation of the lock, and Fig. 5 comprises end and bottom views of the plate on which the lock is pivoted.

Referring to the drawings in detail, a represents the lintel or top box of a sheet-metal window frame or casing.

b is the top rail of a sheet-metal windowsash, and b one of the stiles of same.

0 is the latch or look, and d the plate on which the lock is pivoted and which is riveted to projecting portions or flanges of the top rail. In the construction of sheet-metal windowframes in order to provide the requisite stifiness and secure a close joint between the top of the frame and sash the former is preferably made with a series of bends, as shown, thus providing the flat vertical faces a, a

Serial No. 651533. N Infidel.)

and (1, the last two serving as meeting edges and stops for the sash. In the horizontal face a of the frame a square opening a is out to receive the end 0 of the lock-bolt 0 when the sash is closed. The top rail of the sash is formed with an angular extension or flange b the vertical portion of which abuts against the face a of the window-frame, and the horizontal portion lies under the portion 01, of the frame and is perforated, as at b to admit the end of the lock-bolt.

The angular plate d is riveted to both vertical and horizontal portions of the sashfiange, with its square hole d registering with the opening 17 This plate serves to reinforce the sash-flange and also affords a sup-' port for the lock, which is pivoted on a pin d between the lugs 01 of the plate. The pivotal point 0 of the lock being above its center and the lower part of the lock being much heavier than the upper part, it will swing outwardly from the sash as soon as the bolt is withdrawn from the frame and the sash tilted or swung inwardly.

The lock-casing c is formed with a barrel portion 0 and an upwardly-extending fiat arm 0 in which the pivot-opening is provided. The portion 0' is bored to receive a coil-spring c and a latch-bolt 0 The latch bolt is formed with a square portion 0 which rests on the spring, and a round stem 0 which passes through the spring and projects below the barrel of the casing, where it receives a ring 6, to which a pull cord or chain 6 is'attached, said ring preventing the latchbolt from being pushed outof the barrel by the spring. The upper end of the bolt is beveled and is formed with shoulders c on opposite sides which strike against the upper edge of the barrel when the bolt is retracted, thus limiting the retractive movement of the bolt and taking the strain from the spring as the pull is continued to swing or open the sash. The spring serves to shoot the bolt -into the opening a in the lintel. When the bolt is retracted to the full limit permitted by its shoulders c", it will be entirely free from the frame and the sash may swing on its pivots. In metal windows the sash are usually held by frictional contact with spring-pressed jambs or stiles, which require more or less force to cause them to turn on their pivots. By pulling on the cord e the lower end of the lock is drawn away from the sash, while the upper portion orarrn c is pressed against the lintel of the frame, thus acting as a lever in forcing the sash away from the frame. This leverage may be increased by lengthening the stem of the bolt. The pull on the cord e being first communioated to the spring, the tension of the latter will eifect a gradual yielding of the bolt,-

which will be communicated to the lock-casing, so that when the sash is ready to swing it will move slowly and gradually and not with a jerk, as it would if the pull was directly and quickly applied. As the sashare usually hung above their center, they will close on the frame by gravity, and the bevele'd end of the latch-bolt striking against the corner of the frame will be retracted until it gets opposite the opening a when the spring will shoot the bolt into said opening and the sash will be securely locked.

Having thus described my invention, what I claim as new, and desire to obtain by Letters Patent, is

1. A window-lock composed of a casing haw ing a barrel portion, a latch-bolt and a spring arranged in said barrel portion, an arm extending upwardly and outwardly from the barrel portion and a plate on which said arm is pivoted, substantially as set forth.

2. A window-lock composed of a casing having a barrel portion, a spring arranged in said portion, a latch-bolt arranged in said portion and resting on said spring, and formed with shoulders adapted to limit its retraction, an arm extending upwardly and outwardly from the barrel portion of the casing, and a plate on which said arm is pivoted, substantially as described.

3. A window-lock composed of a casing having a barrel portion, a spring arranged in said portion, a latch-bolt arranged in said barrel stem, an arm extending upwardly and outwardly from the barrel portion of the casing, and a plate on which said arm is pivoted, as set forth. I

4. The combination with a window-frame having angular faces substantially as described, a sash horizontally pivoted on said frame, a lock secured to said sash, said lock composed of a casing having a barrel portion, a spring arranged in said barrel, a latch-bolt in said barrel and resting on said spring, means for limiting the retraction of said bolt, means for retracting said bolt, an arm extending upwardly and outwardly from the barrel portion of the casing, and a plate on which said arm is pivoted, said plate securing the lock to the sash, substantially in the manner and for the purpose set forth,

5. The combination with a window-frame having angular faces substantially as described, a sash horizontally pivoted on said frame and provided with a flange, a plate secured to said flange and having a bolt-opening therein, a lock pivoted on said plate, said lock provided with a barrel portion, a coilspring located in said barrel, a latch-bolt arranged in said barrel and resting on said spring, said bolt having shoulders adapted to limit its retraction, an arm extending from said casing adapted to contact with said frame when the sash is closed against vthe frame, and means for retracting said bolt, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

- JOHN A. KNISELY.

Witnesses:

F. BENJAMIN, S. R. BOWEN. 

